Yes and No, For a long term investment I don't I think so but for a short term long yes it is a must have because it's popular in the Cryptocurrency market.
When it comes to 'should you buy or just mine it' yourself part. I suggest that you buy the dip because of the mining diffculty Bitcoin is facing right now
and as well with the energy consumption diliemma. I don't think it's worth and a lot of people are starting to question the profitability of Bitcoin mining.

https://cointelegraph.com/news/one-of-europes-most-energy-efficient-data-centers-tests-btc-eth-mining